Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6586716d0bf0b7b…

MALICIOUS

PDF

91.2 KB Created: 2021-04-26 15:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: bfeb345add8fdc0f4075a74eb8128495 SHA-1: d65ce66cedcb5df3b6e6a13b4e86d1c48b2f2a8a SHA-256: f6586716d0bf0b7b6adab963c3589af68aa7d1068ba63ffb42e6505daea083e7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to disposable hosting, indicative of a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for distributing further malware or phishing content. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://mezovuduw.ru/strik?utm_term=shepherd+me+o+god+marty+haugen+sheet+music PDF link annotation
    • http://kawlites.online/kiwedusatamopezukajiginupmzba8.pdfIn PDF document text
    • http://nunobuzipame.medianewsonline.com/jobuwajuli.pdfIn PDF document text
    • http://pejazadajenatew.getenjoyment.net/advances_in_3d_printing_additive_manufacturing_technologies.pdfIn PDF document text
    • https://cdn.sqhk.co/kixarozikej/jdgdibt/regipugenajukaforigetede.pdfIn PDF document text
    • http://rineset.xyz/what_to_read_after_handmaids_taleydgpl.pdfIn PDF document text
    • https://cdn.sqhk.co/moxasapiwer/NGjhijq/spreadsheet_add_vba.pdfIn PDF document text
    • http://prosucre.pro/aflatoon_songs._pk_freekpyuy.pdfIn PDF document text
    • http://vinnipoh.space/integrative_therapeutics_heartburn_advantage_reviewsaq4gg.pdfIn PDF document text
    • http://ladebizelase.scienceontheweb.net/mla_citation_format_example.pdfIn PDF document text
    • http://mizafaroremida.getenjoyment.net/jeremy_bentham_philosophy.pdfIn PDF document text
    • https://cdn.sqhk.co/jowibigodene/gjifMqF/adjective_form_of_earthy.pdfIn PDF document text
    • http://matrixbicycles.com/28395626426hwrpa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/xofis.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/genestealer_cult_codex_mega.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/45702602214.pdfIn PDF document text
    • http://fiwimawa.rf.gd/lixuwokiv.pdfIn PDF document text
    • https://18e7ef82-5c75-44fe-ae22-4c356c2c9ce0.filesusr.com/ugd/749e61_3a60ef95cfe24e2e935f20e444edc5a1.pdf?index=trueIn PDF document text
    • http://megigezorozo.atwebpages.com/sally_s_beauty_supply_application.pdfIn PDF document text
    • http://lobosebaj.rf.gd/lizuvimuxagux.pdfIn PDF document text
    • https://734e8db3-b9db-457c-abaa-08c06218e7ae.filesusr.com/ugd/f6bb82_ed77231b11c54c7eaf4d5135de63a55a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/anteater_cartoon_free.pdfIn PDF document text
    • http://buxidogekalor.rf.gd/calories_in_indian_food.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12219 5660 bytes
SHA-256: 799aa3e4341e8a17ba21ff9ab8830d25b2ab71851b9530288bd11863ff02bfa0
font_01_sfnt_off0001353f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1353F 12524 bytes
SHA-256: b7aff61c81c8875beebfd0e034990096c5290e00fb0953b613337165e1e1772a

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